Pramanik Sajib Kumar, Mahmud Shafi, Paul Gobindo Kumar, Jabin Tabassum, Naher Kamrun, Uddin Md Salah, Zaman Shahriar, Saleh Md Abu
Microbiology Laboratory, Department of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi 6205, Bangladesh.
Curr Res Microb Sci. 2020 Nov 27;2:100013. doi: 10.1016/j.crmicr.2020.100013. eCollection 2021 Dec.
Degradation of cellulosic carbon, the most important natural carbon reservoirs on this planet by cellulase is very essential for valuable soluble sugars. This cellulase has potential biotechnological applications in many industrial sectors. Thus the demand of cellulase is increasing more frequently than ever. Agro industrial byproducts and suitable microbes are of an important source for the production of cellulase. and sugarcane bagasse were used for the production of cellulase and different process parameters influencing the production of cellulase were optimized here. The bacterium showed maximum cellulase production in the presence of sugarcane bagasse, peptone and magnesium sulfate at pH 7, 40 °C in 72 h of incubation Primary structures of the cellulase is consists of 400 amino acid residues having molecular weight 44,790 Dalton and the theoretical PI is 9.11. Physiochemical properties of cellulase indicated that the protein has instability index 25.77. Seven hydrogen bonds were observed at multiple sites of the cellulase enzyme; His269, Asp237, Asn235, Tyr271, Ser272, Gln309, Asn233. This protein structure may play first hand in further development of exploring cellulase and cellulose interaction dynamics in sp. Thus this bacterium may be useful in various industrial applications owing to its cellulase producing capability.
纤维素酶降解纤维素碳(地球上最重要的天然碳库)对于获得有价值的可溶性糖非常重要。这种纤维素酶在许多工业领域具有潜在的生物技术应用。因此,对纤维素酶的需求比以往任何时候都更加频繁地增加。农业工业副产品和合适的微生物是生产纤维素酶的重要来源。本研究利用甘蔗渣生产纤维素酶,并对影响纤维素酶生产的不同工艺参数进行了优化。该细菌在pH值为7、温度为40℃、培养72小时的条件下,在甘蔗渣、蛋白胨和硫酸镁存在时显示出最大的纤维素酶产量。纤维素酶的一级结构由400个氨基酸残基组成,分子量为44,790道尔顿,理论PI为9.11。纤维素酶的理化性质表明该蛋白的不稳定指数为25.77。在纤维素酶的多个位点观察到七个氢键;His269、Asp237、Asn235、Tyr271、Ser272、Gln309、Asn233。这种蛋白质结构可能在进一步探索某菌株中纤维素酶与纤维素相互作用动力学方面发挥首要作用。因此,由于其产生纤维素酶的能力,这种细菌可能在各种工业应用中有用。